Electronics Optics & Control, Volume. 20, Issue 6, 79(2013)
ISAR Phase Focusing for Nonuniform Rotating Target Based on Adaptive Chirplet Decomposition
In ISAR imagingthe phase error caused by nonuniform rotation is relevant to the radial position of scatterersso it is difficult for us to use traditional phase focusing algorithms to complete the phase compensationin which the uniform phase correction function is applied.In order to solve the problemwe put forward a phase compensation method based on adaptive Gaussian Chirplet decomposition (AGCD) fast algorithm.In this methodthe linear frequency modulation (LFM) signal parameters of two stronger scatterers in random range bin are obtained via AGCD algorithmand then the multiple prominent point processing (PPP) model is implemented to eliminate the phase error caused by translational motion and nonuniform rotation.This method has the advantages of low computation cost and high accuracyand it doesnt require the scatterer be well isolated.The numerical simulation proves its good efficiency.
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CAI Hong, HE Qiang, ZHAO Chunyu. ISAR Phase Focusing for Nonuniform Rotating Target Based on Adaptive Chirplet Decomposition[J]. Electronics Optics & Control, 2013, 20(6): 79
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Received: May. 30, 2012
Accepted: --
Published Online: Jun. 17, 2013
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